Cementing machine



Sept. 22, 1936. l, L KEITH 2,054,822

GEMENTING MACHINE y Filed March 30, 1952 5 Sheets-Sheet l 26 /lnlm .m52i i I' .L/ i l l Y` I Il i '70 I v I f I g I l I l .l lll ,Ulu ugn. l

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l. L.. KEITH l2,054,822-

I CEMENTING MACHINE I Y Filed March 30, 1952 3 Sheets-Sheet 2 sept. 22,1936.l

Patented Sept. 22, QS

`UNITED sTA'rEs rATaNT oFFlcE 6 Claims.

This invention relates to cementing machines which are primarilydesigned for use in connecy tion with the manufacture of shoes, moreparticularly for the purpose of adhesively connecting 5. cloth doublersto the inner sides of shoe uppers,

and for cementing sock linings and soles in position.

Prior to my present inventionrmachine's of the vertically movable gridtype, illustrated in McMurray Patent No. 1,298,147 have been`extensively used for these purposes. One of the chief objections to amachine of this type, the grid of which is provided with teeth whichapply liquid adhesive to the material in small dots or patches, is thatthe cement applying teeth are likely to cause impressions or unevennessin the material,

While, theoretically, some of these objections would be avoided by theconstruction of my prior Patent No. 1,242,561 of October 9th 1917, inactual practice the construction therein disclosed has certain vitaldefects which nullify the advantages which might otherwise be secured,so that the construction is not usable practically.

cementing operations performed by the several types of machines abovereferred to. Y Y

More specifically, the objects of my invention are to provide a machinewhich may be satisfactorily employed for cementing cloth doublers toleather shoe uppers, which will accomplish this result without causinguneveness of the surface of the leather, also, to provide a machinewhich is adapted to perform the operation of cementing soles and socklinings in the manner disclosed in said patent to Bowlen, withoutemploying a cementing grid.

Other objects are to provide a machine of the aboveY described characterwhich is adaptedto 'In the patent to Bowlen No. 1,814,430 of July" 14,1931, and in my Patent No. 1,856,562 dated perform more satisfactorilythe different kinds of Y be power driven, so that the operator will berelieved of the work kof operating a treadle, as is usually necessary inthe grid type vof machine, but which will at the same time obviate kthedefectsof the construction of my said prior Patent No. 1,242,561, and toprovide a machine which v5 will enable the operator to perform cementingoperations of the kind above referred tol more rapidly than has beenpossible with machines of the grid type.

I accomplish these objects by providing a 10 applied in dots, stripes,or patches, in any desired 15 arrangement, by means of a roll having asuitably indented surface forming projecting teeth, or ribs, to the topsof which a thin film of adhesive is applied by a smooth-surfaced roll,to which a thin coating of a suitable adhesive has been 2O applied, thetransfer of the adhesive from the tops of said teeth or ribs to the beltbeing accomplished by deflecting the latterinto contact therewith from aposition in which they are normally held out of contact, so that theamount of 25 i adhesive transferred Vand subsequently applied may beaccurately varied and controlled. Also by providing the indented rollwith a plurality of corresponding surface formations, each of whichconsists of a series of adhesive applying projec- 3u tions,corresponding preferably tothe grid arrangementshown in said patent toBowlen, for applying-adhesive to-different portions of a` sole, or socklining-according to certain predetermined requirements of said portions,said formations be- 35' ing so arranged relatively that thecorresponding applications of adhesive tothe belt, on its work ireceiving portion, are presented successively, so

that the belt may be operated at a slow speed and several soles orlinings may be cemented while the belt is being moved a distancecorresponding to the length of the sole.

For a more complete disclosure of the invention reference is now made tothe following specification, in connection with the accompanyingdrawings, in which: *Y

Fig. lis a top plan view of a machine embodying my invention. v

FigQZ is a sectional view at line 2-2 of Fig.' 1. 50 Fig. 3 is a view inelevation of one end of the machine.

Fig. 4 is a detail view `of the driving mechanism. Fig. 5 is a detailsectional View of the cementing apparatus. 55

Fig. 6 is a plan View of the peripheral surface, unrolled, of the cementapplying roll.

Fig. 7 is a sectional view of a portion thereof adjacent the surface.

Fig. 8 is a detail perspective View of a. bearing for the belt.

Fig. 9 is a detail perspective View of a cement roll bearing.

Fig` 10 is a view indicating a type of work which may be performed bythe machine.

As shown in the drawings, the frame of the machine is preferably made inthe form of a table having a horizontal top I6, which is supported bylegs II.

The operating mechanism is principally located beneath the top, andbetween the legs and is driven by an electric motor I2 mounted near thebottom of the frame. A shaft I4 is driven by a belt from the motor thrua pulley I5, said shaft having a Worm gear I6, Which is meshed with agear Il on a horizontal shaft IS, mounted in suitable bearings on theframe. A gear I9, on shaft I8, is meshed with a gear 26, on a roll shaft2|, and a gear 22, on shaft 2|, is meshed with a gear 23, of the samesize as gear 22, on a roll shaft 24 directly thereover. The gear I9 isalso meshed with a gear 25 on a pulley shaft 25, directly over shaft I8.l

A pair of hanger rods 21, 28 are rigidly mounted on the underside of thetop I0 and depend vertically therefrom and the shaft 24 is mounted inbearings 30, (one of which is shown in detail in Fig. 9,) which are inturn mounted for adjustment on the hanger rods 2T, 28. A pair ofbearings 32, similar to bearings 36, are also mounted on said rods andthe roll shaft 2| is journaled therein. A smooth surfaced cylindricalroll 34 is mounted on shaft 2| between said bearings and a pan 35 forliquid adhesive is mounted on a shelf 36, the

Ylatter being supported on brackets 3l mounted on the rods 2l, 28, andbeing arranged to be raised and lowered thereon by means of a shaft 38mounted in bearings 39, also supported on the rods 2l, 28, said shafthaving a handle 4I) and arms 4I arranged to engage the under side of theshelf, to raise and lower the same, so that the roll 34 may be partlysubmerged in the liquid in the pan 35, or the pan may be lowered, sothat its top edge is below the level of the lowest portion of the roll34, permitting ready remo-val of the pan for cleaning and other puposes.

Each bearing 32 is provided with a post 42, on each of which a sleeve 44(Fig. 2) is slidably mounted, and a coil spring 45 is arranged on eachpost 42 between each sleeve and the bearing. 32,

each sleeve being held against the corresponding spring by a nut 46threaded on the end portion of the post 42. A rod 48 is mounted in thesleeves 42 above the posts 42 and a holder 49 is mounted on said rod andhas a fiat blade, or doctor56 secured thereto on a flat surface thereof,in position to extend into close proximity at its edge to the surface ofthe roll 34. The rod 48 is extended be yond the sleeve 42 at one end anda coil spring 52 is mounted thereon between the sleeve 42 and a collar53 on the rod. A pin 54 in the rod 4 8 is held in a notch in theopposite side of sleeve 42 from the spring 52, to form a friction lockto hold the doctor 56 in operative relation to the roll 34. A handle 55is provided in the holder 49, by means of which the doctor may be liftedout of operative position.

A roll 56 is mounted on the shaft 24 with its surface in rolling contactwith the roll 34. The formation of the surface of roll 56 may be varied,

and different formations will beremployed for the different kinds ofwork which the machine is designed to perform.

For all classes of work which the machine is designed to perfo-rm thesurface of the roll will be broken by various grooves, which extend bothcircularly and longitudinally thereof, so as to make the surfacediscontinuous and to provide the roll with a series of short fingers,ribs or bars the ends or tops of which fo-rm faces which are separatedfrom each other and lie in a cylindrical surface, which, as a matter ofconvenience in design, is of same diameter as that of roll 34.

A pulley 66 is mounted on the shaft 26, and a similar pulley 52 ismounted on a shaft 53 in parallel relation to, and at the same level asthe shaft 26. The shafts 25 and 63 are mounted in bearing brackets 59,65, respectively secured tothe under side of the top I6, and a smoothsurfaced belt lil, preferably of leather, 1s extended about said pulleys66, 62.

The top ii) is cut away above the belt and the arrangement is such thatthe belt is driven horizontally at ,approximately the level of the uppersurface of the top |6.

Any suitable means may be provided for placing the belt under tension,so that it will not sag, and will run horizontally between the pulleys,the means shown comprising abjustable bearing blocks 72, in the brackets65, said `blocks having screw threaded rods 'I3 connected thereto whichextend through the frame and are engaged by nuts 14.

A holder is pivotally mounted in arms '|55 secured to brackets 65, and acleaning knife or scraper 'I3 is mounted on said holder with its edge inengagement with the belt '16, at a point slightly abo-ve the level ofthe axis of shaft 63. A spring Il acts to press the edge of the knife.against the belt, and a handle 'I9 is connected to the holder l5, topermit the knife to be swung out o f contact with the belt for cleaningpurposes. When held in normal position the knife 'I8 will removepractically all adhesive which may be left on the. belt, and as theknife inclines downwardly from its edge, provides a trough which isarranged to discharge into a second trough 8|), extending from the lowerend thereof to the pan 35, as shown in Figs. 2 and 8.

A metal, belt-deflecting roll 32 is rotatably ,-f'

mounted in the ends of a pair of arms 83, directly over the roll 56 andin position to engage the inner side of belt '16, said arms beingpivotally supported at their opposite ends in brackets 84 mounted on theunder side of the. frame top, and adjusting screws 85 being arranged insimilarly supported brackets 8G, to engage the undersides of said armsand vary the pressure which may be applied to the inner side of the beltby the weight of roll 82.

The roll 56 and the pulleys which carry the belt I0 are so arrangedrelatively that the belt moves directly o-ver and in close proximity tothe surface of the roll, but Without actually touching it, as it movesalong the lower portion "1 of its travel.V When, however, the weight ofthe roll 82 is permitted to bear on the belt with sumcient force, thebelt will be deflected into Contact with the roll 56.

When the machine is operated, the belt travels fromleft to right at Vthesurface of the top I6 and the roll 56 travels in the direction in whichthe belt travels at their points of contact, as indicated by the arrowsin Figs. 4 and 5, and all of the contacting surfaces of the rolls 34 and56 ll, at which point the operator may place the certezzal I and thebelt 10 travel at the vsame surface speed j in the same direction attheir respective point of contact.

toits surface will be removed by the doctor 55, except a thin filmthereof, which will be partly transferred to the faces on the ends ortops of.

the projections, ribs, or lingers of the rollA 56. The adhesive thusdeposited will then be transferred to the surface ofthe beltv10. Dotsandstripes of adhesive will thus be applied to the belt and carried therebyto the level of the top article to be cemented at on 'the belt as ittravels, so that when the article is removed, v

`f-1contact with the surface to which it is to be adhesively connected,finishing the operation. Surplus adhesive, not taken up by the article,will then be removed from the beltby the knife 18, which will flow downvthe knife on` to the i-trough and be returned to the pan 35, so that,

when the belt again comes in contact with the roll 56, and the abovedescribed operation is repeated, and adhesive will only be applied tothe article in a predetermined manner.

As previously indicated, the surface formation Y of the roll 56 will bevaried according to the work to be performed. In performing the Workdescribed in said patent to Bowlen in the manner described therein, theparticular formation shown in Figs. 6 and 1 will be employed, Fig. 6being a plan of the surface of the roll 56 as if laid at, or unrolled.As shown, the roll surface is made up of three separate circularlyarranged sections of equal width and of a length equal the circumferenceof the roll, each section comprising a group of cross ribs 90, 9i, 92, agroup of circumferentially extending ribs 93, 94, 95, and a group ofprojecting teeth, or fingers 96, 91, 98. Each group of each section isarranged in staggered relation to the corresponding groups of the othersections, so that each group of any one section is opposite o-rlongitudinally aligned with two different groups of the other twosections. As shown, each group is of approximately the same lengthcircumferentially, but this is not essential, the practical essentialbeing that the end of each section be o-ne-third of a circumference fromthe corresponding ends of the other sections. The three groups of eachsection are of a length corresponding to the longest sole or sock liningwhich is to be cemented, the group of crossed ribs corresponding to theheel part, the group of circumferential ribs to the shank and the groupof separate projections to the fore part of the sole, or sock lining tobe cemented. It will be understood that these lengths in practice willbe approximations, as it would ordinarily be impractical to have asection correspond eX- actly to each sole pattern.

With this arrangement, when the machine is operated, the adhesive willbe applied to the belt 10 in stripes and dots corresponding to thegroups above described, no adhesive being applied by the slottedportions of the roll, so that successive surface portions of the beltwill have adhesive applied thereto corresponding to the diagram of Fig.6. The operator will then place a sole on one of the sections in such aposition that the heel part Will rest on the cross barred portion 90,its shank part on the ribbed portion 94 and its forepart on thedottedportion 98, so that adhesive will be appliedV thereto in the manner in-lV dicated in Fig. 10, and will remove it and place it in the positionin which it is to be adhesively held. The speed of the belt will betimed to correspond to the time required for this operation,

so that the group 5l will havewadvanced to approximately the position ofthe group 95 by the time the operator can place the next sole on thebelt. These operations will be successively re peated on the ydifferentsections, so that there will be no delay in the operation. y

If cloth doublers are to be cemented, the entire surface of roll 5S willbe made up of projec-y tions, or teeth corresponding to those of groups9S, 91, 98, so that cement will be applied thereto in dots over theentire surface. As the doubler, or leather to which the adhesive isapplied is pressed on to a perfectly flat surface, there will be notendency to cause indentations on the work.v Also the amount of adhesivewhich is applied may be accurately controlled in two ways, first, byadjusting the doctor 55 so as to vary the thickness of the film ofadhesive which will be applied by the roll 35 to the faces of theribsand fingers on the roll 55, and, second, by varying the force ofengagement of the belt with said faces by means of the roll 82. Theadjustment will ordinarily be such that the belt is not forced intoactual contact with said faces, as they are separated by the film ofadhesive.

The particular means employed for applying the adhesive to the belt isimportant for several reasons. For example, if the roll 34 were omittedand the roll 56 employed to transfer the adhesive directly from thecement pan to the belt, the adhesive would become suspended betweenadjacent projections, so that it would be applied to the belt oppositethe recesses in the roll, in addition to what would be applied by thefaces of the projections.

With the above described machine the operations which have previouslybeen performed by the vertically movable grids is greatly facilitatedand the physical effort required by the operators, who are usuallywomen, is greatly reduced.

I claim:

1. In a machine for applying liquid adhesive, a smooth surfaced endlessbelt, a pair of pulleys arranged to drive said belt horizontallytherebetween, a cylindrical roll mounted to rotate about a xed axisdirectly beneath said belt in position to engage the surface thereofbetween said pulleys during the lower portion of its horizontal travel,means for applying a lm of adhesive to the surface of said roll, and anadjustably mounted deflecting device arranged to engage the inner sideof the belt in parallelism with said axis and directly above said roll,to hold the belt in engagement with the surface of the roll.

2. In a machine for applying liquid adhesive,

Ya smooth surfaced endless belt, a pair of pulleys arranged to drivesaid belt horizontally therebetween, a cylindrical roll arrangeddirectly beneath said belt in position to engage the surface thereofduring the lower portion of its horizontal travel, means for applying alm of adhesive to the surface of said roll, and a deflecting devicearranged to engage the inner side of the belt to hold it in tangentialrelation with said surface and be adjusted to vary the force ofengagement of the belt therewith.

3. In a machine for applying liquid adhesive, a horizontally rotatableroll having a cylindrical surface, means for applying a thin coating ofca f adhesive to said surface as the roll is rotated, a pair ofhorizontally mounted pulleys arranged one at each side of and above saidroll, a smooth surfaced endless belt driven horizontally by said pulleysand normally held in proximity to, and

out of contact with the surface of said roll dur ilarly shaped pieces ofsheet material, an endless belt arranged to be continuously driven inone direction in a position to permit the pieces to be placed on itsouter surface, and means to apply adhesive to said surface in aplurality of sections having different portions thereof arranged insequence in a plurality of rows which extend lengthwise of the belt andin different relative positions cross wise thereof, so that saidsections are successively advanced to the position at which the piecesare to be applied thereto,

5. In a machine for applying adhesive to simlar pieces of sheetmaterial, an endless belt arranged to be continuously driven in onedirection and in position to permit thepiecesto be placed on its outersurface, and means for applying adhesive to said surface in a pluralityof sections each composed of a group of adhesive carrying 5 portions ofvarying cement carrying capacity arranged in sequence longitudinally ofthe belt, said sections being applied in different positionstransversely of the belt, so that they are successively advanced to thepieceV receiving position. 10'

6. In a machine for applying adhesive to sole shaped pieces of sheetmaterial, an endless belt arranged to be continuously driven in onedirection and in position to permit the pieces to be placed on -itsouter surface, means to apply ad- 15 hesive to said surface in aplurality of sections each composed of a group of adhesive carryingportions of varying cement carrying capacity corresponding to theforepart, shank, and heel part portions of the pieces and arranged inse- 20 quence longitudinally of the belt, said sections being appliedindifferent positions transversely of the belt so that they aresuccessively advanced to piece receiving position.

IRVING L. KEITH.

